using below code I mean to get chart of accounts from several tables. All tables have identical structure, only node depth changes - all tables node depth is 3, one's node depth is 5. After reload, instead of desired one table Accounts I arrive with three tables: Accounts, Accounts-Expanded Nodes and $Syn. What could be done to get one table one?

I am not sure why it ends like that - Accounts-Expanded Nodes is an automatic table created during hierarchy load and shoud get auto-dropped, but probably something goes wrong because of the loop. I would first load the whole adjacent node table (via the loop) and then reload it using hierarchy load:

The Hierarchy prefix makes a transformation that needs the entire Adjacent Nodes table - an output record from this transformation has information from many of the input records. So, concatenation of two different Hierarchy prefix statements will lead to unpredictable results.